Method for preparing strontium silicate powder material by using strontium hydroxide and silica fume

Abstract

The invention discloses a method for preparing a strontium silicate powder material from strontium hydroxide and silica fume. The preparation method comprises the following steps: respectively dissolving strontium hydroxide, the silica fume and sodium hydroxide and then blending, after maintaining in a water bath under a sealed condition, placing a sample in a Buchner funnel for low-pressure suction filtration, and then carrying out vacuum drying on the strontium silicate powder filtered by suction to obtain the strontium silicate powder material. The use amounts of the strontium hydroxide, the silica fume and the water are 12.5%, 25% and 62.5% respectively, and the use amount of the sodium hydroxide is determined according to the pH of a mixed solution. The strontium silicate powder material has good stability at high temperature, not only can be used as a sintering aid to promote sintering of the composite material, but also can be used as a solid lubricating material to improve thehigh-temperature friction performance of the composite material. Meanwhile, strontium silicate doped with rare metal elements can also be used as a novel long-afterglow material. According to the method, the silicon fume without any pretreatment is directly used as a raw material to directly synthesize the strontium silicate powder material by a hydrothermal method, strontium silicate powder material synthesis processes such as high-temperature synthesis and sol-gel can be replaced, the process is simple, the cost is low, and the high added value utilization of industrial solid wastes can be realized.

Description

technical field [0001] The invention belongs to the field of preparation of silica fume salt powder, in particular to a method for preparing strontium silicate powder material by using strontium hydroxide and silica fume. Background technique [0002] Long afterglow materials can be roughly divided into 3 categories, sulfide materials, aluminate materials and silicate materials. The sulfide system has not been widely used due to its poor chemical stability, while the long-lasting materials of the aluminate system are widely used, there are many related researches, and the preparation process is relatively mature. The long afterglow material of the silicate system has excellent performance. In recent years, a lot of research has been carried out on the preparation of silicate materials at home and abroad. [0003] Strontium silicate is a long-lasting luminescent material with good chemical stability and strong water resistance, and its luminescent color is complementary to t...

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Problems solved by technology

However, the high-temperature solid-phase method also has its disadvantages, such as high preparation temperature, which is not conducive to energy saving and environmental protection, coarse grains, and reduced luminous brightness after grinding

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